Perhaps you should try some spelling variations:
"luxembourg outcome study" » "luxembourg october study", "luxembourg cote study", "luxembourg future study"
"luxembourg outcome studies" » "luxembourg october studies", "luxembourg cote studies", "luxembourg future studies"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luxembourg outcome study") OR ("luxembourg income study"))) OR ("luxembourg outcome studies")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"luxembourg outcome study\") OR (\"luxembourg income study\"))) or (\"luxembourg outcome studies\"))".
• Removing quotes may allow a broader search: (((( luxembourg outcome study ) OR ( luxembourg income study ))) or ( luxembourg outcome studies )).
• Adding a wildcard symbol may retrieve word variants: (((("luxembourg outcome study") OR ("luxembourg income study"))) or ("luxembourg outcome studies"))*.